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Watercooled pushrod inline four, "903"cc, mounted transversely in front, driving the front wheels.
McPherson struts and sway bar at the front, transverse leaf spring at the rear.

Modifications:

engine & transmission:
Shaved head & block, circa 300 degree race cam (Virtanen), Autobianchi A112 Abarth: inlet manifold/valve gear cover, exhaust manifold (rest of the exhaust DIY), Air-cleaner (for now), 5-speed gearbox and a driveshaft, Weber 2-barrel downdraught carb, Magneti-Marelli electronic ignition.

Chassis:
Front: Monroe shock absorbers and Bmw 2002 springs.
Rear: DIY lowering blocks.
Magnesium wheels

No radio

What's next

The engine really needs a rolling road setup. The Abarth air-cleaner seems to be restrictive. Planning to turn the front camber couple of degrees negative.